I'm now 60 hours in and only have complete 4 regions Story Arc. I'm in for a very long playthrough it would appear.
Of these 4 regions, I have gotten every single wealth, artifacts, and little gold treasures. For the most part I also did all the Mysteries except 2 Anomalies that are bugged, and 1 of the 3 sisters that still kick my ass. I also killed most of the Zealots in those zones.
I did do a little detour to go get all the pieces of the Hidden Ones Armor Set which meant going to some higher level zone, I skipped most of the content and just went for the set pieces. I cheated and google their general locations, not the specifics on how to actually find them.
I am now in Lundun, where I've gotten all the wealth, mysteries and artifacts and starting on the story arc.
I'm enjoying the story arc of each region, and the overall story arc. I like the Mystery puzzle like the mushrooms, the ones where you need to align the symbols. They are not hard but fun to figure out. I also like the anomalies aside from the fact that they are bugged. I hope they fix that soon.
I'm also enjoying how some of the treasures require a little bit of thinking sometimes to get to them with shooting lock through windows, or finding a passage. Nothing hard by any means but just a little bit of thinking to be fun, but not annoyingly so.
I love the fishing and hunting to complete the stuff at the hunting lodge and fishing hut. It's a nice distraction once in a while.
I'm doing the dailies from Rada, but haven't seen anything really worth buying with the Opals. Nothing really impressive on the Store to be honest. Maybe there will be something cool in the future to get.
The main issue I have with combat is that it seems that Adrenaline generates too slowly making it too restrictive to use abilities, I seem to remember being able to use my abilities far more consistently in Odyssey. The abilities are generally pretty nice but just can't seem to be able to use them enough. At this point I find it more useful to keep Dive of the Valkyrie level 2 to break down the doors that are locked from the other by diving beside them.
I'm pretty sure I'm heading to 140+ hours to complete it the way I play. The main issue is that I will most likely not be done before Cyberpunk. I guess I'll have to push that a little if not.
The AC games might not be the best games, but they sure do push all my buttons in term of open world exploration. Even though Fast Travel is actually fast now, I still walk or ride most of the time since I just love traveling through the environment, it seems there's always a sunset or sunrise.